Add usage dashboard like Claude.ai has at /settings/usage

What feature would you like to see?

Problem: No way to check Codex usage limits.

What Claude provides:
https://claude.ai/settings/usage shows:

• Current session usage
• Weekly limits
• Reset timers

What Codex needs:
A similar page at https://chatgpt.com/settings/codex-usage (or similar URL) showing:

• Current session usage
• Weekly usage remaining
• When limits reset

Why this matters:

• Hit limits unexpectedly
• No visibility into usage
• Competitor already provides this

Current state: Users are completely blind to their Codex usage.

Note: If there's already a way to check usage that I'm not aware of, please let me know!

Additional information

_No response_